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Back to active CVEs
Critical · CVSS 9.8CVE-2026-81002

xdp: fix zero-copy frame layoutCVE-2026-81002

Answer in brief

CVE-2026-81002 records a Critical severity (CVSS 9.8) vulnerability in xdp: fix zero-copy frame layout. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Oct 19, 2026Source checked Oct 27, 2026First seen by HOL Sep 11, 2026Material review Oct 19, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 27, 2026
References
8 linked sources
Open source record

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <444216dacdbebd3e52d5e704facafbb230da09e9 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <15d1f3c0dbe7a740f779337deb39f23cd8d002c8 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <68d7cc5512238693670fc19c7a615df631e10edf || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <71283aaa6c65b3cec84caf1dc78560985737641f444216dacdbebd3e52d5e704facafbb230da09e9, 15d1f3c0dbe7a740f779337deb39f23cd8d002c8, 68d7cc5512238693670fc19c7a615df631e10edf, 71283aaa6c65b3cec84caf1dc78560985737641f
Linux/Linuxgeneric4.20Not reported
Linux/Linuxgeneric>=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <22092730129077c302d8c947bbe0876f0280c528 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <ced3e18cd9b9caf630aaa1e1eac305f5192ba896 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <6de17275b3ccdf9887568b07e54da2e3597217cf || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <444216dacdbebd3e52d5e704facafbb230da09e9 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <15d1f3c0dbe7a740f779337deb39f23cd8d002c8 || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <68d7cc5512238693670fc19c7a615df631e10edf || >=b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 <71283aaa6c65b3cec84caf1dc78560985737641fdcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f, 22092730129077c302d8c947bbe0876f0280c528, ced3e18cd9b9caf630aaa1e1eac305f5192ba896, 6de17275b3ccdf9887568b07e54da2e3597217cf, 444216dacdbebd3e52d5e704facafbb230da09e9, 15d1f3c0dbe7a740f779337deb39f23cd8d002c8, 68d7cc5512238693670fc19c7a615df631e10edf, 71283aaa6c65b3cec84caf1dc78560985737641f

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 444216dacdbebd3e52d5e704facafbb230da09e9; Linux/Linux to dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 11, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: xdp: fix zero-copy frame layout xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page and advertises PAGE_SIZE as its frame size. It allows the copied frame to occupy the page tail needed by skb_shared_info and records zero headroom even when metadata separates the frame header from packet data. An AF_XDP zero-copy packet redirected through cpumap can therefore make the skb overlap skb_shared_info or place it beyond the allocated page. Limit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the metadata length in frame headroom. Redirect callers already handle a NULL conversion result. BUG: KASAN: slab-out-of-bounds in skb_gro_receive Write of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146 Call Trace: skb_gro_receive (net/core/gro.c:174) udp_gro_receive (net/ipv4/udp_offload.c:812) inet_gro_receive (net/ipv4/af_inet.c:1539) dev_gro_receive (net/core/gro.c:515) gro_receive_skb (net/core/gro.c:633) cpu_map_kthread_run (kernel/bpf/cpumap.c:395) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:164) ret_from_fork_asm (arch/x86/entry/entry_64.S:255) Kernel panic - not syncing: KASAN: panic_on_warn set ...

Quoted source text, attributed separately from HOL analysis.